Add build id to tabzilla js.
Bug 888653
Make the news item about Firefox OS release conditionnally included for locales and insert the right blog post
Merge pull request #1006 from pascalchevrel/bug_888653_activate_news_url_locales
Merge pull request #1007 from pmclanahan/add-build-id-tabzilla-js

Add build id to tabzilla js.